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-rw-r--r--fs/xfs/xfs_types.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/xfs/xfs_types.h b/fs/xfs/xfs_types.h
index 398cf681d02..7a41874f4c2 100644
--- a/fs/xfs/xfs_types.h
+++ b/fs/xfs/xfs_types.h
@@ -133,6 +133,20 @@ typedef __uint64_t xfs_filblks_t; /* number of blocks in a file */
#define MAXAEXTNUM ((xfs_aextnum_t)0x7fff) /* signed short */
/*
+ * Minimum and maximum blocksize and sectorsize.
+ * The blocksize upper limit is pretty much arbitrary.
+ * The sectorsize upper limit is due to sizeof(sb_sectsize).
+ */
+#define XFS_MIN_BLOCKSIZE_LOG 9 /* i.e. 512 bytes */
+#define XFS_MAX_BLOCKSIZE_LOG 16 /* i.e. 65536 bytes */
+#define XFS_MIN_BLOCKSIZE (1 << XFS_MIN_BLOCKSIZE_LOG)
+#define XFS_MAX_BLOCKSIZE (1 << XFS_MAX_BLOCKSIZE_LOG)
+#define XFS_MIN_SECTORSIZE_LOG 9 /* i.e. 512 bytes */
+#define XFS_MAX_SECTORSIZE_LOG 15 /* i.e. 32768 bytes */
+#define XFS_MIN_SECTORSIZE (1 << XFS_MIN_SECTORSIZE_LOG)
+#define XFS_MAX_SECTORSIZE (1 << XFS_MAX_SECTORSIZE_LOG)
+
+/*
* Min numbers of data/attr fork btree root pointers.
*/
#define MINDBTPTRS 3